Abstract: The present invention relates to a pole transformer load monitoring system using a wireless Internet network. The load monitoring system is capable of measuring, in real time, a variety of load parameters (phase voltages, phase currents and temperatures) of a pole transformer placed on a distribution line. The results of the measurements are transferred to an operator in a branch operating station over the wireless Internet network so as to prevent losses resulting from overloaded and unbalanced states, thereby enhancing the quality of power supply and efficiently managing a distribution load.
Type:
Grant
Filed:
November 7, 2001
Date of Patent:
March 23, 2004
Assignee:
Korea Electric Power Data Network Co. Ltd.
Abstract: Disclosed herein is a probe for measuring voltage/current of a low voltage power distribution cable. A probe has a body having a first opening and a first recess and made of an insulating material. A lower core is inserted into the first recess of the body, and a coil is wound around an insulating material installed at the lower core for detecting an induction current. A capacitor and a resistor are connected between output lines extended from the coil so as to filter out noise components, and a ground line is electrically connected to one end of the lower core. A voltage detection terminal is electrically connected to the low voltage power distribution cable for detecting voltage applied to the low voltage power distribution cable. A voltage output line is used for outputting the detected voltage. A connector is connected to output sides of the output lines extended from the coil, the ground line and the voltage output line.
Type:
Grant
Filed:
February 7, 2002
Date of Patent:
September 23, 2003
Assignee:
Korea Electric Power Data Network Co. Ltd.
Abstract: An apparatus for testing a CATV transmission line according to the present invention, wherein a down-signal to subscribers from a CATV broadcasting station is split into a plurality of signals and an upstream transmission line for leading said down-signal and a plurality of downstream transmission lines for transmitting split signals are separated from each other, whereby said upstream transmission line and said downstream transmission lines are tested separatedly, comprises one main input terminal adapted to be connected to said upstream transmission line, a plurality of main output terminals adapted to be connected to a plurality of downstream transmission lines respectively, a splitter for splitting a signal from said main input terminal to a plurality of first split output terminals, said splitter being connected to said main input terminal and provided with said plurality of first split output terminals, and a plurality of second split output terminals, connected to said plurality of main output terminal
Type:
Grant
Filed:
September 25, 1997
Date of Patent:
March 16, 1999
Assignee:
Korea Electric Power Data Network Co., Ltd.